<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图区 -->
    <el-card>
      <!-- 搜素与添加区 -->
      <el-row :gutter="20">
        <el-col :span="8">
          <el-input
            v-model="queryInfo.query"
            placeholder="请输入内容"
            clearable
            @clear="getGoodsToFirstPage"
          >
            <el-button
              @click="getGoodsToFirstPage"
              slot="append"
              icon="el-icon-search"
            ></el-button>
          </el-input>
        </el-col>

        <el-col :span="4">
          <el-button type="primary" @click="goAddPage"> 添加商品</el-button>
        </el-col>
      </el-row>
      <!--商品列表 -->
      <el-table v-loading="loading" :data="goodlist" border stripe>
        <el-table-column type="index" :index="index1"> </el-table-column>
        <el-table-column prop="goods_name" label="商品名称"></el-table-column>
        <el-table-column
          prop="goods_price"
          label="商品价格(元)"
          width="95px"
        ></el-table-column>
        <el-table-column
          prop="goods_weight"
          label="商品重量"
          width="70px"
        ></el-table-column>
        <el-table-column prop="add_time" label="创建时间" width="140px">
          <template slot-scope="scope">{{
            scope.row.add_time | dateFormat
          }}</template>
        </el-table-column>
        <el-table-column label="操作" width="130px">
          <template slot-scope="scope">
            <el-button
              v-permission="[116]"
              type="primary"
              icon="el-icon-edit"
              size="mini"
              @click="editById(scope.row.goods_id)"
            ></el-button>
            <el-button
              v-permission="[117]"
              type="danger"
              icon="el-icon-delete"
              size="mini"
              @click="removeById(scope.row.goods_id)"
            ></el-button>
          </template>
        </el-table-column>
      </el-table>
      <!-- 分页 -->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[2, 4, 6, 8]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
        :disabled="loading"
      >
      </el-pagination>
    </el-card>
    <!-- 修改商品 -->
    <el-dialog
      title="编辑商品"
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClosed"
    >
      <!-- 主体内容 -->
      <el-form
        :model="editForm"
        :rules="editFormRules"
        ref="editFormRef"
        label-width="100px"
      >
        <el-form-item label="商品名称" prop="goods_name">
          <el-input v-model="editForm.goods_name"></el-input>
        </el-form-item>
        <el-form-item label="商品价格" prop="goods_price">
          <el-input-number
            v-model="editForm.goods_price"
            :min="1"
            label="描述文字"
          ></el-input-number>
        </el-form-item>
        <el-form-item label="商品数量" prop="goods_number">
          <el-input-number
            v-model="editForm.goods_number"
            :min="1"
            label="描述文字"
          ></el-input-number>
        </el-form-item>
        <el-form-item label="商品重量" prop="goods_weight">
          <el-input-number
            v-model="editForm.goods_weight"
            :min="1"
            label="描述文字"
          ></el-input-number>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="eidtGoods">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      index: 1,
      goodlist: [],
      // 获取商品列表的参数对象
      queryInfo: {
        query: '',
        // 当前的页数
        pagenum: 1,
        // 当前每页显示的数量
        pagesize: 4,
      },
      // 总条目数
      total: 0,
      loading: true,
      editDialogVisible: false,
      editForm: {
        goods_name: '',
        goods_price: '',
        goods_number: '',
        goods_weight: '',
      },
      editFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名', trigger: 'blur' },
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' },
        ],
        goods_number: [
          { required: true, message: '请输入数量', trigger: 'blur' },
        ],
        goods_weight: [
          { required: true, message: '请输入重量', trigger: 'blur' },
        ],
      },
    }
  },
  created() {
    this.getGoodsList()
  },

  methods: {
    // 获取商品列表
    async getGoodsList() {
      this.loading = true
      const { data: res } = await this.$http
        .get('goods', {
          params: this.queryInfo,
        })
        .then((result) => {
          // 成功的回调
          // console.log('成功的回调')
          return result
        })
        .catch(() => {
          // 失败的回调
          // console.log('失败的回调')
          return Promise.reject('抛出错误')
        })
        .finally(() => {
          this.loading = false

          // console.log('成功或失败都会执行的回调')
        })

      if (res.meta.status !== 200) {
        return this.$message.error('获取用户列表失败')
      }
      // console.log(res)
      this.goodlist = res.data.goods
      this.total = res.data.total
    },
    async getGoodsToFirstPage() {
      this.queryInfo.pagenum = 1
      this.getGoodsList()
    },
    // 监听pagesize 改变的事件
    handleSizeChange(newSize) {
      // console.log(newSize)
      this.queryInfo.pagesize = newSize
      this.getGoodsList()
    },
    // 监听页码值改变的事件
    handleCurrentChange(newpage) {
      // console.log(newpage)
      this.queryInfo.pagenum = newpage
      this.getGoodsList()
    },
    // 编辑商品
    async editById(id) {
      const { data: res } = await this.$http.get(`goods/${id}`)
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.status)
      }
      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 根据ID删除商品
    async removeById(id) {
      const confirmResult = await this.$confirm(
        '此操作将永久删除该商品, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning',
        }
      ).catch((err) => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const { data: res } = await this.$http.delete(`goods/${id}`)
      if (res.meta.status !== 200) {
        this.$message.error(res.meta.msg)
      }
      this.$message.success(res.meta.msg)
      this.getGoodsList()
    },
    // 编辑
    async eidtGoods() {
      const { data: res } = await this.$http.put(
        `goods/${this.editForm.goods_id}`,
        this.editForm
      )
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg)
      }
      this.$message.success(res.meta.msg)
      this.getGoodsList()
      this.editDialogVisible = false
    },
    // 点击跳转到添加商品页面
    goAddPage() {
      this.$router.push('/goods/add')
    },
    editDialogClosed() {
      this.$refs.editFormRef.resetFields()
    },
    index1(index) {
      if (this.queryInfo.pagenum === 1) {
        return index + 1
      }
      if (this.queryInfo.pagenum != 1) {
        return (
          (index += (this.queryInfo.pagenum - 1) * this.queryInfo.pagesize) + 1
        )
      }
    },
  },
}
</script>
